difficult but not in the official gmat sense

pros: It is a good tool to know where you stand in verbal overall across cr/sc/rc.
it calculates takt time, which is quite an interesting concept-basically tells you in how much time you can expect yourself to get a correct answer. it calculates this individually for cr/sc/rc

also the ability tests tell you your weak spots in all of cr/sc/rc without wasting much of your time. So that you jump into prepping for topics that you're weak in.

it is convenient to use.

cons: the passages of cr/rc are difficult but not difficult from gmat perspective. if one has solved enough official gmat questions you'll instantly know the difference. scholaranium is great to build your skills, but stick to og questions once scholaranium has built your skills and helped you develop certain thinking patterns.